CVE-2026-69641 Microsoft Exchange Server Elevation of Privilege Vulnerability
An authorized attacker can elevate privileges on Microsoft Exchange Server due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-69641?
CVE-2026-69641 is a critical missing authorization vulnerability in Microsoft Exchange Server, published on 8 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-862
Which versions are affected by CVE-2026-69641?
It affects 2 products.
Products include Microsoft Exchange Server, Microsoft Exchange Server Subscription Edition.
How do I fix CVE-2026-69641?
No fix has been published for CVE-2026-69641 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-69641 being exploited?
There is no known exploitation of CVE-2026-69641 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Exchange Server
- CVE-2024-21410 Microsoft Exchange Server Privilege Escalation
- CVE-2021-34473 Microsoft Exchange Server Remote Code Execution
- CVE-2021-26855 Microsoft Exchange Server Remote Code Execution
- CVE-2021-34523 Microsoft Exchange Server Privilege Escalation
- CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data
Sources
Also known as GHSA-wvx2-g3w5-c329.